An Application of the Theory of Planned Behavior to Study Red-Light Running Behavior of Adolescent Riders in Ho Chi Minh City, Vietnam

Although Vietnam has recently made a significant effort to improve its transportation infrastructure, it still suffers from a high number of traffic accidents compared to neighboring countries. One of the most prevalent causes is red-light running by younger motorcyclists, which saw a significant increase in violations from 2020 to 2022. The main objective of this research is to investigate the red-light running violation behavior of younger riders by applying the Theory of Planned Behavior (TPB). The study uses data sampled from 252 younger riders in Ho Chi Minh City. The results showed that the TPB model accounted for 40% and 52% of explained variance in intention and behavior, respectively. Attitude, subjective norm, and perceived behavior are the essential predictors of red-light running violation. This violation is mediated by motorcyclists’ gender and transportation mode. The findings from this study could be used to promote effective countermeasures and safety educational programs to reduce the number of red-light running occurrences.